Water-gage cock.



No. 743,354. VPATBNTBB Nov. s, 1903.

' C. C. WAKEFIELD..

WATER GAGE COCK.

APPLICATION I'ILED'MAB.. 30. 1903.

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No. 743,354. PATBNTED NOV. 3, 1903..

' o. G. WAKEPIBLD.

WATER GAGE 000K.

APPLIUATION FILED 111113.30. 1903.

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UNITED ySTATES Taten-ted November 3, 19032 PATENT OFFICE.

WATER-GAGE COCK.

SPECIFICATION forming part of Letters Patent No. 743,354, dated Novmbelv3, 1903- Application filed March 30, 1903. Serial No. 150.242. LNomodel.)

To a/ZZ whom may concern:

Beit known that LCHARLES'CHEERS WAKE- FIELD, a subject of the King IofEngland, residing at London, England, have invented certain new anduseful Improvements in Water-Gage Cocks, of which the following is aspecification.

This invention is for improvements in water-gage cocks, and has for itsobject to provide means by which in the event of the gage-glass breakingthe cocks comm unicatiu g with the boiler may automatically close.

According to this invention valves normally open, but adapted to closeagainst the admission of steam or Water, are provided at each end of thegage-glass, and with these is combined a test-valve normally maintainedclosed by the pressure of steam in the gage. Connection is made betweenthe gage-valve and the test-valve, so that as long as this Vvalveremains closed the gage-valves will be maintained open, notwithstandingiiuctuations which may take place in the steam-pressure; but the momentthe pressure is removed from the test-valve by fracture of the gageglassthe gage-valves are freed and close against the admission of steam orwater to the gage-glass.

In the accompanying drawings, Figure 1 is a side elevation of agage-cock in part section, constructed according to one method of carrying out this invention. Fig. 2 is a front elevation of the same, alsoin part section; and Fig. 3 is a plan of a detail. V

Like letters indicate like parts throughout the accompanying drawings.

The gage-glass A is `carried in mounts or brasses B at each end, eachmount being provided with a gland B of any convenient construction toprevent leakage at the point where the glass enters the mount. Eachmount is hollow and is provided with a base or flange B2, by which itmay be secured to `the boiler, and the base is perforated at B3 to admitsteam or water from the boiler to the interior of the mount.

Within each mount B and interposed between the gage-glass and theorifice BE is a barrel C. The barrels are open at one end, which facesthe boiler, and are perforated at C2, so that uid can pass from theboiler through the barrels to the gage-glass.

Each

barrel is preferably formed integral with a hexagonal nut or` head O andscrewed into place, so that it may be readily removed for examination orrepair. The open end of each barrel is controlled by a mushroom-valve D,adapted to close against the passage of duid from the boiler to thegage-glass. These inlet-Valves D are carried by spindles D', supportedat one end in the base B2 of their respective mounts and extended at theother end through the barrel and beyond the mount.

4A gland D2 is provided at that end of each barrel remote from theboiler. This gland supports the free end of the valve-spindleand'prevents leakage between it and the barrel C. Each valvespindle D'is cut away at D4 D5 to permit the free passage of fluid from the boilerto the interior of the barrel C, and

thus to the gage-glass A when the valves D u are open.

Secured to each mount B is an arm E. (Shown in plan, Fig. 3.) Each armcarries at its free end a bearing E' to receive a shaft F. The shaft Fis free to be partially rot-ated in its bearings by means of ahand-wheel E', conveniently secured at the upper end, and arms or leversF2 are secured to the shaft, the free end of each arm F2 entering a slotor orifice D6, one in each of the valve-spindles D', so that each valveis thus operatively connected with the shaft F. To the lower mount B issecured a valve-box G, provided with a barrelH similar to the barrel Cin the mounts B. This barrel is interposed between the gage-glass andits outlet-passage K, by which the contents of the glass can bedischarged. The open end of the barrel communicates with the interior ofthe gage-glass, but is controlled by a mushroom-valve J. The barrel H isperforated at H', so that its interior communicates with the dischargeor outlet passage K. The spindle J of the valve J extends through thebarrel H and is carri-ed in a gland J2 in a similar manner to thespindles D' of the valves D. The shaft F carries a third arm or leverL,the free end of which enters a slot or orifice J 3 in thevalve-spindle J', so that this valve is thus operatively connected withthe shaft F. The levers F2 andL are so disposed upon the shaft Frelatively to their respective valves that when the blow-oii or outletICO The operation of this device is as follows: Should the inlet-valvesD be closed, the shaft F is partially rotated by means of its handwheelF', so that the inlet-valves are opened and the outlet-valve Jconsequently closed. Steam and water then enter the gage-glass A throughthe perforations B3 in the mounts B, the open ends of the barrels C, andthe perforations C2. This admission of steam to the gage-glass creates apressure within the same which bears upon the outlet-valve J landmaintains this valve closed, while there is practically no tendency toclose the inletvalves D, as the conditions are practically static withthe exception of a slight interchange of steam and water due tocondensation Within the gage-glass. Should, however, the gage-glass A befractured by any means, the outlet-valve J is immediately relieved ofthe pressure, and the rush of fluid from the boiler through each of themounts B immediately drives the valves D back upon the ends of thebarrels C, so that communication between the boiler and the gage-glassis cut off. Sucient play is allowed the inlet-valves D, so that theoutlet-valve J may be opened by partially rotating the shaft F by handwithout closing the valves D. This permits anysediment collected in thegage-glass to be blown out through the outlet-passage K. To insure thatthe valves D shall not close through any surging of the steam or waterwithout fracture of the gage-glass, the area of' the valve J upon whichthe pressure Within the gage-glass is exerted is preferably made equalto or greater than the sum of the areas of the valves D.

It will be seen that by means of this invention a fractured gage-glassmay be readily re-r by hand all three valves are moved when the.

valve J is opened for the purpose of blowing through the gage-glass.This results in these valves being always kept free, so that they do notstick and fail to come into operation` should the gage-glass A break,which is a point of great utility, as many of the safety devices atpresent in use fail to operate when required through their remaining inone position for such a length of time that they become rigidly fixed.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In a water-gage for a boiler the combination of a gage-glass, mountsfor the ends of the glass each having an inlet communicating with theinterior of the glass and the boiler, a valve controlling each inlet andadapted nto close against the passage of fluid from the boiler, a bodyadapted to be displaced by` the pressure in the gage, a stop to limitthe amount of displacement and means opera-l tively connecting this bodyWith the valvesso that when the former is displaced the valves are heldopen, as set forth.

2. In a water-gage for a boiler the combination of a gage-glass, mountsfor the ends of the gage-glass each having an inlet communicating withthe interior of the glass and the boiler, a valve controlling each inletand adapted-to close automatically against the passage 'of fluid fromthe boiler, a valve controlling an outlet from the gageglass the valvebeing adapted to close against pressure within the glass, and means foroperatively connecting this valve with those which control the inlets sothat when the former is closed the latter are held o-pen, as set forth.

3. Ina water-gage for a boiler the combination of a gage-glass, mountsfor the ends of the gage-glass -each having an inlet communicating withthe interior of the glass and the boiler, a valve controlling each inletand adapted to close against the passage of fluid from the boiler, asliding spindle to each valve projecting through the mount,means toprevent leakage between the spindle and the mount, a valve controllingan outlet from the gage-glass the valve being adapted to close againstpressure Within the glass, a sliding spindle to this valve, and meansfor operatively connecting the spindle of this valve withthose of theinlet-valves so that when t-he outlet-valve is closed the inlet-valvesare held open, as set forth.

4. In a Water-gage for a boiler the combination of a gage-glass, mountsfor the ends of the gage-glass each having an inlet communicating withthe interior of the glass and the boiler, a valveA controlling eachinlet and adapted to close automatically against the passage of fluidfrom the boiler, a valve controlling an outlet from the gage -glass theval ve being adapted to close against pressure within the glass, meansfor operatively connecting this valve with the inlet-valves so that whentheloutlet-,valve is closed the inlet-valves are held open and viceversa, and means for controlling the movement of the outlet-valveindependently of the pressure in the gage-glass, as set forth. A

5. Ina water-gage fora boiler, the combination of a gage-glass, mounts-for the ends of the gage-glass each having an inlet communicating withthe interior of the glass and the boiler, a valve controlling each inletand adapted to close against the passage of fluid from the boiler, asliding spindle to each valve projecting through the mount radially tothe gage-glass, means to prevent leakage between the spindle and themount, a valve controlling an outlet from the gage-glass, the valvebeing adapted to close against pressure within the glass, aslidingspindle to this valve projecting through the mount radially tothe gage-glass, a shaft parallelto theglass, bearings for the shaft andarms operatively connecting the spindles ofthe valves with the shaft sothat when Athe outlet-valve is closed the inlet-valves are held open, asset forth.

IIO

the gage-glass each having an inlet communicating with the interior ofthe glass andthe boiler, a valve controlling each inlet and adapted toclose against the passage cf fluid Y from the boiler, a spindle to eachvalve projecting through the mount, means to prevent leakage between thespindle and the mount, a valve controlling an outlet from the gageglass,the valve being adapted to close against pressure within the glass, aspindle to this Valve, a shaft, arms operatively connecting the spindlesof the valves with the shaft so that when the outlet-valve is closed theinlet-valves are held open, and means for operating the shaft carryingthe arms independently of the pressure in the gage-glassas set forth.

7. In a water-gage for a boiler the combination of a gage-glass, mountsfor the ends of the gage-glass each having an inlet communicating withthe interior of the glass and the boiler, a valve controlling* eachinlet and adapted to close against the passage of fluid from the boiler,a valve controlling an outlet from the gage-glass the valve beingadapted to close against pressure within the glass and presentingagreater area to the pressure within the gage-glass than the sum of thearea of the inlet-valves, and means for operatively connecting thisvalve with the inlet-valves so that when the outlet-valve is closed theinlet-valves are held open, as set forth.

8. In a water-gage for a boiler the combination of a gage-glass, mountsfor the ends of the gage-glass each having an inlet communicatin g withthe interior of the glass and the boiler, a removable barrel within eachmount interposed between the inlet of the mount and the gage-glass andopen at one end toward the boiler, a valve adapted to close the open endof each barrel against the passage of fluid from the boiler, means ofcommunication between the interior of each barrel and the gageglass, aremovable barrel interposed between the gage-glass and adischarge-outlet for the same and open at one end toward the gageglass,a valve adapted to close the open end of the barrel against the passageof fluid from the gage-glass, means of communication between theinterior of the barrel and the outlet, and means for operativelyconnecting the inlet-valves with the outlet-valve so that when thelatter is closedthe inlet-valves are held open, as set forth.

9. In a water-gage for a boiler the combination of a gage-glass, mountsfor the ends of the gage-glass each having an inlet communicati-ng withthe interior of the glass and the boiler, a removable barrel within eachmount interposed between the inlet of the mount and the gage-glass andopen at one end toward the boiler, a valve adapted to close the open endof each barrel against the passage of iuid from the boiler, means ofcommunication between the interior of each barrel and the gageglass, aspindle to each valve projecting through the barrel and extending beyondthe socket of the gage-glass, means to prevent leakage between eachspindle and its barrel, a removable barrel interposed between thegage-glass and a dischargeoutlet for the same and open at one end towardthe gage-glass, 'a valve adapted to close -the open end of the barrelagainst the passage of liuid from the gage-glass, means of communicationbetween the interior of the barrel and the outlet, a spindle to theoutlet-valve continued through the barrel and extended beyond the same,means for preventing leakage between the spindle and its barrel andmeans for operatively connecting the spindle of this valve with those ofthe inlet-valves so that when the outlet-valve is closed theinlet-valves are held open, as set forth.

10. In a water-gage for a boiler, the combinationV of a gage-glass,mounts for the ends of the gage-glass each having an inlet communicatingwith the interior of the glass and the boiler, a valve controlling eachinlet and adapted to be closed against the passage of iuid from theboiler by the pressure of said iiuid, a valve controlling an outlet fromthe gage-glass said valve being adapted to close against pressure withinthe glass and means for operatively connecting this valve with thosewhich control the inlets so that when the formeris closed the latter areheld open, as set forth. In testimony whereof I have signed my name tothis specification in the presence of two subscribing witnesses.

CHARLES CHEERS WAKEFIELD.

Witnesses WILLIAM H. BALLANTYNE,

A. M. HAYWARD.

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